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The nth term of AP is 3n+ 1 and the sum to the n terms is |
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Answer» ong>Answer: 3p+1 Step-by-step EXPLANATION: Tn=(3n-1) Sn= 3.sigma n - sigma(1) Sn= 3.{n.(n+1)/2} - n Sn= {3.n.(n+1)- 2n}/2. = n/2.(3n+1). Putting n=p Sp=p/2.(3p+1). . Answer |
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